LDAP AD and SAMCompatibleName

Hello, I use rlm_ldap to authenticate users in the AD directory. Part of my ldap config: identity = cn=admin,cn=users,dc=example,dc=com base_dn = cn=users,dc=example,dc=com filter = "(userPrincipalName=%{%{Stripped-User-Name}:-%{User-Name}})" So I can use upn form for authentication, for example echo "User-Name=user@example.com,User-Password=password" | radclient localhost:1812 auth testing123 -x Is it possible for rlm_ldap to use not only upn form, but also SAMCompatibleName form like echo "User-Name=REALM\user,User-Password=password" | radclient localhost:1812 auth testing123 -x ? Thanks, Andrei